Duplex S31803 S32205 Stainless Stainless Steel Flat Bar

GNEE supplies Duplex 2205 (UNS S31803/S32205) stainless steel flat bars that comply with ASTM A276/A479 standards. Featuring a dual-phase microstructure comprising both austenite and ferrite, these bars undergo solution treatment and pickling to relieve internal stresses and ensure superior surface quality. They are widely utilized in critical sectors such as oil and gas, chemical processing, marine engineering, pressure vessels, and structural components.

We offer 2205 flat bars in a Hot Rolled, Annealed, and Pickled (HRAP) condition, available in widths ranging from 25mm to 60mm and thicknesses from 5mm to 12mm. Standard lengths typically range from 3 to 6 meters, though custom lengths are available upon request. Additionally, to meet specific client requirements, we can provide customized specifications covering a broader range of dimensions (e.g., widths from 10mm to 500mm and thicknesses from 2mm to 100mm).

We provide comprehensive value-added processing services, including cutting, bending, welding, and surface finishing. A Mill Test Certificate (EN 10204 3.1) is provided with every batch of products, and third-party inspections (such as SGS) can be arranged upon request.

 

How is 2205 flat bar produced?

1. Cold-Drawn Steel Bar Processing Flow: Electric Arc Furnace Steelmaking + Ladle Refining + Vacuum Degassing + Continuous Casting + Hot Rolling + Shot Blasting + (Annealing) + Cold Drawing + Oiling + Bundling + End Facing + Packaging + Marking

 

 

Duplex S31803 Stainless Stainless Steel Flat Bar Specifications

Standard	ASTM A479,ASTM A276,ASTM A484, ASTM A582,
Material	2205 UNS S310803 UNS S32205
Specifications	Round bar	Diameter:0.1~500mm
	Angle bar	Size: 0.5mm*4mm*4mm~20mm*400mm*400mm
	Flat bar	Thickness	0.3~200mm
		Width	1~2500mm
	Square bar	Size: 1mm*1mm~800mm*800mm
Length	2m, 5.8m, 6m, or as required.
Surface	Black, peeled, polishing, bright, sand blast, hair line, etc.
Price Term	Ex-work, FOB, CFR, CIF, etc.
Export to	Singapore, Canada, Indonesia, Korea, USA, UK, Thailand, Peru, Saudi Arabia, Viet Nam, India, Ukraine, Brazil, South Africa, etc.
Delivery Time	Standard size is in stock,prompt delivery or as order's quantity.
Package	Export standard package, bundled or be required. The inner size of container is below: 20ft GP: 5.9m(length) x 2.13m(width) x 2.18m(high)about 24-26CBM 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high) about 54CBM 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high) about 68CBM

 

Specifications

Thickness	width and length
3mm x From min.	20mm / 25mm / 30mm / 40mm / 50mm / 60mm / 65mm /75mm / 150mm max. ( Widths ) x 6000mm
4mm x From min.	25mm / 30mm / 40mm / 50mm / 60mm / 65mm /75mm / 150mm max. ( Widths ) x 6000mm
5mm x From min.	25mm / 30mm / 40mm / 50mm / 60mm / 65mm /75mm / 150mm max. ( Widths ) x 6000mm
6mm x From min.	25mm / 30mm / 40mm / 50mm / 60mm / 65mm /75mm / 150mm max. ( Widths ) x 6000mm
8mm x From min.	40mm / 60mm / 65mm / 75mm / 150mm max. ( Widths )x 6000mm
10 mm x From min.	50mm / 60mm / 65mm / 75mm / 150mm max. ( Widths )x 6000mm
15 mm x From min.	50mm / 60mm / 65mm / 75mm / 150mm max. ( Widths )x 6000mm

 

2205 Flat Bar Delivery Condition:

All 2205 flat bars must be delivered in the solution-annealed (+AT) condition. This is intended to ensure a balanced ratio of austenite to ferrite and to relieve processing stresses.

 

What is the difference between S31803 and S32205 flat bars?

S32205 is an enhanced version of S31803, which represents the original standard for duplex stainless steel. S32205 features higher minimum limits for nitrogen (N), chromium (Cr), and molybdenum (Mo) content; consequently, it offers superior pitting corrosion resistance (reflected in its PREN value) and more stable mechanical properties.
Gnee Recommendation: Currently, the majority of high-quality flat bars available on the market are "Dual Certified," meaning they simultaneously meet the requirements of both standards.

 

Applications of 2205 Flat Bar

Marine Engineering: Platform structural components, fasteners.
Paper Industry: Digesters, bleaching equipment.
Petrochemicals: Support components, pump and valve parts.
Environmental Protection: Flue Gas Desulfurization (FGD) system support frames.

 

Packing of UNS S32205 cold drawn steel bars:
1.Surface: Anti rusty oiled
2.Rusty proof packages:film wrapped inside and Nylon plastic bags wrapped outside
3.Max 1000kgs per bundle
4.Marking of each bundle: Sizes, PCS, Weight, Heat No., Date , Origin and so on.